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  <title>ol-ext: Select control</title>
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  <meta name="description" content="Control to select features by attributes	." />
  <meta name="keywords" content="ol3, control, select, vector, feature, attribute" />

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  <a href="https://github.com/Viglino/ol-ext" class="icss-github-corner"><i></i></a>
  <a href="../../index.html">
    <h1>ol-ext: Select control</h1>
  </a>

  <div class="info">
    <i>ol.control.Select</i> is a control to select features by attributes in a source.
    <ul>
      <li>
        You have to define a <i>ol.source.Vector</i> to search in or an array.
      </li>
      <li>
        A <i>select</i> event is fired when features are selected. 
      </li>
    </ul>
  </div>

  <!-- DIV pour la carte -->
  <div id="map" style="width:600px; height:400px;"></div>

  <div class="options" style="max-width:20em;">
    <h2>Options:</h2>
    <i>Click on the map to select a feature / use the control to look for features by attributes.</i>
    <ul style="list-style:initial; padding: 0 1em;"></ul>
  </div>
  
  <script type="text/javascript">
  // Layers
  var layers = [
    new ol.layer.Geoportail('ORTHOIMAGERY.ORTHOPHOTOS')
  ]

  // The map
  var map = new ol.Map({
    target: 'map',
    view: new ol.View({
      zoom: 5,
      center: [166326, 5992663]
    }),
    layers: layers
  });

  // GeoJSON layer
  var vectorSource = new ol.source.Vector({
    url: '../data/departements.geojsonx',
    format: new ol.format.GeoJSONX(),
    attributions: [ "&copy; <a href='https://www.insee.fr'>INSEE</a>", "&copy; <a href='https://www.data.gouv.fr/fr/datasets/geofla-r/'>IGN</a>" ],
  });

  map.addLayer(new ol.layer.Vector({
    name: 'Departements',
    source: vectorSource,
    style: function(f) {
      return new ol.style.Style({ 
        image: new ol.style.RegularShape({
          radius: 5,
          radius2: 0,
          points: 4,
          stroke: new ol.style.Stroke({ color: "#000", width:1 })  
        }),
        text: new ol.style.Text ({
          text: f.get('id').toString(),
          font: 'bold 11px sans-serif',
        }),
        stroke: new ol.style.Stroke({
          width: 1,
          color: [255,128,0]
        }),
        fill: new ol.style.Fill({
          color: [255,128,0,.2]
        })
      })
    }
  }));

  // Select  interaction
  var selecti = new ol.interaction.Select({
    hitTolerance: 5,
    condition: ol.events.condition.singleClick
  });
  map.addInteraction(selecti);
  // Select feature when click on the reference index
  selecti.on('select', function(e) {
    var f = e.selected[0];
    if (f) {
      var prop = f.getProperties();
      var ul = $('.options ul').html('');
      for (var p in prop) if (p!=='geometry') {
        $('<li>').text(p+': '+prop[p]).appendTo(ul);
      }
    }
  });

  // Select control
  var selectCtrl = new ol.control.Select({
    // target: $(".options").get(0),
    source: vectorSource,
    property: $(".options select").val()
  });
  map.addControl (selectCtrl);
  selectCtrl.on('select', function(e) {
    console.log(e);
    selecti.getFeatures().clear();
    for (var i=0, f; f=e.features[i]; i++) {
      selecti.getFeatures().push(f);
    }
  });


  </script>
  
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